1. Butternut squash should be peeled and chopped into 1/2-inch thick cubes. (You should note that using a vegetable peeler with serrated edges is better.)
2. A medium saucepan of water should be brought to a boil. Cook for 5 to 6 minutes, or until the squash is fork soft (test a piece to see if it is done).
3. Drain and transfer to a medium mixing bowl. Combine the olive oil, kosher salt, garlic powder, and freshly ground black pepper in a large mixing bowl. Season to taste with more seasonings if desired.

See this video recipe on how to cook butternut squash.